Exercise device



FIG. 1 is a perspective view of an exercise device.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a top plan view of the exercise device, the bottom plan view being a mirror image of the top plan view; and,

FIG. 5 is a left side elevational view thereof, the right side elevational view being a mirror image of the left side elevational view. 

The ornamental design for an exercise device, as shown and described. 